Mechanical rectifier



Sept. 14 1926.

W. BURSTYN MECHANICAL RECTIFIER Filed June 17. 1925 Patented Sept. 14, 1926.

UNITED STATES WAL'IHEB BURS'IYN, OF BERLIN, GERMANY.

MECHANICAL RECTIFIER.

Application ma June 17, 1925, Serial No.

- motions by means of ratchet wheel, unilateral brakes or similar mechanical rectifiers especially electrical devices for winding-up clock-works frequently consist of an electromagnet the armature of which is fitted with a self-interrupter and drives the catch of a ratchet wheel.

The purpose of my invention is to create a very simple mechanical rectifier able to opcrate with oscillations of very small amplitude and relatively high frequency or more per second) and I accomplish this purpose by using instead of one (or two) ratchets of relatively large mass, as usual, 8. multitude of small ratchetsevery one consisting of an elastic sheet, wire or the like. Hairs or bristles of animals jointed together as, brushes or pencils, are particularl suitable since their wear is surprisingly slig t.

The drawing shows several examples indicating howm in practice. In the drawing Figure 1 shows a diagrammatic side view of a ratchet wheel and operating lever,

Fi 2 is a similar view showing a modified orm,

Fi 3 is a similar view of a further modified orm,

Fig. 4 is a view in a modified surface, I

Fig. 5 is astill further. modified form, Fig. 6 is a side view similar to Fig. 1,

Fig. 7 is a diagrammatic view showing an electro-magnetic device, and

Fi 8 is a perspective view of a modified e ectro-magnetic device.

The ratchet wheel 1 may be provided with regular or irregular teeth and grooves such similar to Fig. 2 but showas may be cut with a file, or provided only with a rough or elastic surface or covered with india-rubber as shown in Fig. 4.

The cogged or rough surface of the ratchet wheel may be provided on the outside as shown in Figs. 1 and 6 or on the inside as shown in Fig. 3. Also in order to save space and rovide a'thin wheel,thegrooves are rovided on the flat side face as shown in i .2,5,7and8.

i second fixed ratchet 4 is not essential when the inertia of the wheel 1 and the other rotating parts joined thereto is sufiiciently hi h so that no backward movement will ta 0 place. Itis, of'course, possible, but generally not advantageous, to rectify both invention may be carried out 37,837, and in Germany December 5, 1922.

directions of the oscillating movement by means of two sets of brushes 31 and 32 fixed on the same lever 2 and, both driving the wheel 1 in the same direction at opposite phases.

The motions of the oscillating and the rotating part preferably take place parallel to one another, as indicated by the arrows. They may, the relative position of both being-quite the same, also be inclined or even perpendicular against one another, the bristles thus carrying out a slanting movement as shown in Fi 6.

The mechanical motion transformer according to the invention is suitable for transforming any mechanical vibration into a rotary motion, as for instance winding-up clockworks by the shocks of walking or driving, for sound-recording and so on. However, the chief application is the construction of a small electromotor by rectifying the vibrations of the armature of an electromagnet which is'energized by an alternating or interrupted current.

A suitable form of electromotor is illustrated in Fig. 7. The windings of the electromagnet 5 are energized by an alternating current. Its armature 7 is attached to a spring plate or lever 2, fixed at one end and having a brush 3 on the other end. The natural frequency of this oscillating part is preferably equal to double (in the case of a polarized magnet the same) the frequency "of the alternating current in order to obtain the maximum amplitude by resonance.

When direct current is to be used or when the frequency of the armature is desired to be at times lower than that of the alternating current, the simplest way is to provide the armature with a self-interrupting device. In Fig. 8, 5 signifies the electromagnet, 7 its Z-shaped armature, 8 aplatespring sliding into two pins of flie armature and provided with the contact-plate 9 of the self-interrupter. The shaft 10 of the arma- -ture' carries the double arm 2 bearing on its ends the brushes 3 and driving, as described above, the ratchet-wheel 1.

I In every case instead of a simple electromagnet a so a polarized magnet (as mentioned) may be used. Altogether, I do not desire to limit my invention to the precise details of construction and arrangement herein set forth, as it is obvious that various modifications may be made therein without departing from the essential features of my invention as defined in the following claims: 2. A mechanical motion transformer com- 1 I claim prising a wheel having a plurality of 1. A mechanical motion transformer comgrooves therein; and an oscillating driving prising a wheel having a rough surface; and lever for the wheel, said lever comprising a. an oscillating driving means for the wheel; plurality of elastic bristles forming a brush said means comprising a plurality of elastic adapted to contact with the grooves of the members forming a brush adapted to contact wheel in order to rotate it. with the rough surface of the wheel in order In testimony whereof I affix my slgnature. to rotate it. DR. WALTHER BURSTYN. 

